Multiple deck screen



Allg- 23 192% 'H s. woobwARD MULTPLE DECK so-REERl Filed Aug. 21. 1924 FIG 1 3 Sheets-Sheet 1 .NMR

me/M101 Aug. 23,1927. 1,639,678

H. s. WOODWARD MULTIPLE DECK SCREEN Filed Aug. l21. 1924 s sheets-sheet 2 www? .Aug. 23, 139-27.

H; S. wooDwARD MULTIPLE DECK SCREEN Filed Aug'. 21. 1924 s sheets-sheet 3 Patented Aug. 23, 1927.

i vumran is-'rATE-S nnrmnnfrl s.` WoonWARn, or cARBoNnALn, rnNNsYLvANIA.

MULTIPLE DECK SCREEN.

Application filed August 21",.1924. Serial No. 733,269.'

N ly invention relates particularly to that class of screening or `sifting devices Whereina plurality offoraminous diaphragms are maintained in spaced relation by separate .i frame units which may be conveniently secured together to form a composite screen structur-e in which said units are So integrally united as to he capable of severe vibration Without accidental` displacement.

Li The principal objects of my invention `are to provide a screen structure ofthe-type contemplated. in which the unit components may be readily separated topermit the free removal and replacement of -the inteiposed foraminous diaphragms, and be quickly and conveniently clamped ,togetherto form an integral structure. i

Other objects of :my-invention areto provide a multiple unit screen structure with mea-ns arranged to effect the separation of said units contemporaneonsly and to maintain them in substantially uniform spaced relation With respect to each other, irrespec tive of the amount ofsuch separation` My invention .also comprehends novel means which serve not only to cause the units to register When approaching each other. but also tomaintain them, as Well as the foraminous diaphragm held therebe-y 'if" tween, inalinement While being clamped.`

Specifically stated, the form of my invention as hereinafter described, coilnp'rises a plurality of foraminousplates or reticulated diaphragms'- interposed between separate 3f spacing units, which may preferably be: hingedly connected to be oscillated abouti an axis spaced therefromyand which .may be connectedV with means arranged to Ieffect their relative separation aboutsaid axis so as to radiate therefrom in fanllikerelation and permit the convenient removal and replacement of saidplatesor diaphragms asl desired.

My invention also includes all of the various novel features of construction and .arrangement as hereinafter more 4definitely specified." f

in the accompanying drawings, Figure l is a side elevational view "of a screening apparatus of the multiple deck typegshowing a convenient embodiment. of vmy invention;

is an elevational view of the 'discharge end of the apparatus sho'ivnin Il.; Fig. 3 is an elevational view ofthe intake end ofsaid apparatus; '.Fig. 4' is a 4transverse vertical sectional 'view of said apparatus7 taken on the line 4 4- in Fig. 1 Fig. 5 is a central vertical longitudinal sectional view *of the apparatus showing its units separated toperinit the removal and replacement of the perforated diaphragms; Fig. 6 is a fragmentary detail sectional view, on.an enlarged scale,'showing the means for effecting` alinement of the` spacing frame units; and Fig. 7 is a fragmentary plan View showing a corner of one of the foraminous diaphragms. 1 V Y Thel screening apparatus shown in said figures is provided with four decks comprisy ing the foraminous diaphragms or perforated plates l, 2, 3 and 4l, t-he discharge pan 5 having the flanges 6, and comprising an imperforate channel of sheet material, and e,

theV cover deck, comprising imperforateplate 7. l

The pan and the perforated plate Ll are carried by the base frame Ycomprising` the sid-e rails S which are connected at the initial or receiving end of the screen bv the the preferably kchannel iron 9, formed U-shapedand having the free parallel arms thereof embracing therails 8 and secured to the outside faces of said rails by the bolts l0.

Said base frame is mounted upon blocks or standards l2 throughwhich it may pref erablv be bolted tothe yielding frame bars ,l5 of the vibratory mechanism` which' may be of .any desired construction, the rails 8 and standards 12 upon oppositesides of the screen being convenientlyY connected by the transversely disposed angle irons. 19 which not only conn-ect the ,frame members but serve to stiffen the bottom of the pan 5.

The perforated plates 2, 3 and l and the cover plate '6 are maintained in relatively spaced relation by the spacing `frame unitsV comprising the side rails 22, 23, 24 and 2, respectively connected transversely by the channel irons 27, 28, .29 and 30 formed U- sha'ped and having their free parallel arms embracing their respective side rails 22, 9.3, 2d and v2G and secured to the outer faces thereof by the` bolts 31, 32, and` 34.

lcd

' 8, 23, 24 and 26 are provided with screws having heads 47 extended above said faces, and arranged to project through suitable apertures 48 in the margins of the respective diaphra'gms l, 2, 3 and 4 and extend into complementary sockets 49 in the under faces of the side rails 22, 23, 24 and 26 the heads 47 extended from the surface of the side rails 8 being also extended through apertures 50 in the lianges 6 of the pan 5. Y

The composite structure thus assembled may be rigidly held together by .suitably provided clamps which embrace said structure and which may preferably comprise the hasps 52 hingedly connected to the side rails 8 by the pintles 53 and having` their free extremities 54 extended across theside rails and terminating in the upwardly directed opposed ears 85, as best-shown in FigA 4. Said hasps are arranged to be connected by the through bolt or stay rod 86 which extends through said ears 85 and through the spacing sleeve 87 serving as a gauge to properly space said hasps when the nuts 88 of said bolt 86 engage said ears.

The free extremities 54 of said hasps, which extend transversely over the side rails, are preferably provided with set screws 90 which may be adjusted to impinge upon the cover plate 7, and thereby tend to bind or press the frame side rails against the opposite surfaces .of the margins of the interposed plates or diaphragms.

Should it be desired to remove and replace any of the plates or diaphragme, the clamps may be released and the hasps 52 thrown back upon their pintles 53, thus permitting the frame units to be separated and caused to assume a relatively inclined or fan-like position by oscillating .them about the axis of the shaft 36, thereby allowing the plates or dia hrao'ms which loosel rest u von said CTL frame units to be withdrawn by merely lifting them sufficiently to clear the projecting heads 47 on the side rails of said units.

To facilitate the separation of the spacing units, their side rails 22, 23, 24 and 26, may be provided near their free ends with inverted U-shaped bails 55, 56, 57 andv58 respectively, having the free ends of their parallel arms pivoted tothe rails at 60, 6l, 62 and 63, said bails being` provided with the eye-bolts 64, 65, 66 and 67 respectively connected by flexible cablesfor chains68, 69, 70 and 7l, after passing over the drums 72 and 73, with the grooves 75, 76, 77 and 78 of effected by the crank handle 8O on the shaft 8l having the pinion 82 in toothed engagement with the gear 83 on the shaft 84 of the cone sheave.

It will be obvious that the unit 22 will bel connected with the groove of greatest diameter, the unit 23 with the groove 76 of less diameter, the unit 24 with the groove 77 of still smaller diameter, and the unit 26 with the groove 7 8V of smallest diameter, so that when the cone sh-eave 7 9 is rotatedV the' relative rate of movement of said units ywill uniformly decrease from the top unit downward and their relative separation therefore be substantially uniform.v

My invention is advantageous, in that the cover and perforated plate supports are hingedly connected at the receiving end of the screen to oscillate about a common axis, and the entire assembly is clamped rigidly together in its operable form by the hinged clamps by which any desired degree of pressure may be exerted to hold the parts firmly' together, while by the. merel loosening of said clamps and throwing them back out of the path of the screen units, said units may be raised by a fan-like movement about said axis and the entire assembly separated to units at relatively difpermit the plates and pan to be readilyv rej moved and replaced without removinoany other bolts or fastenings.

Although foraminous diaphragme and perforatedfplates are herein referred toit is' to be understood that the screeningvmedium may comprise a reticulated wire mesh or any other desired form of means for., separating the relatively fine from the coarser particles. l v

I do not desire to limit my invention to the precise details of construction and arrangement as herein set forth, as itis obvious that lvarious modificationslmay be made therein withoutdeparting from the essential features of my invention as defined in the appended claims. f

I-Iaving thus described my invention, I

claim l. A screen comprising relatively spaced I iii) perforated diaphragme, and a plurality of spacing units respectively having one end hingedly connected and arranged to be relatively moved about a common axis extended in spaced relation with respect to the hinged ends of said units, whereby adjacent unite may be caused to engage or release the marginal edges of the diaphragm disposed therebetween.

3. A screen comprising relatively spaced perforated diaphragme, a plurality of spacing units hingedly connected to be relatively oscillated about a common aXie disposed away from said units, and between which units the margins of said diaphragme may extend and be removably engaged, and clamping means embracing said units and arranged to lock said units and diaphragme together to form a rigid composite screen structure. l

A. A screen comprising a plurality of relatively spaced perforated diaphragme, hingedly connected spacing units between which said diaphragme are arranged to be removably engaged, and means operative to relatively separate said unite by simultaneously moving them about the axis of said hinged connection to permit removal of the diaphragms.

5. A screen comprising relatively spaced perforated diaphragme, a plurality of spacing units hingedly connected to be relatively moved toward and from each other about a common axis, and means arranged to relatively separate said unit-s and to move them at such relatively different speeds that the ,spaces between adjacent units will be maintained substantially uniform.

6. A screen comprising relativ-ely spaced perforated diaphragme, a plurality of spacing units bet-ween which the margins of said diaphragme may be removably engaged, means arranged to clamp said units andy dia phragme together to form a rigid composite structure, and means arranged to Simultaneously separate said units at one of their relatively adjacent ends while maintaining` them in uniformly spaced relation irrespective of the extent of their relative separati-on.

'l'. A screen comprising relatively spaced perforated diaphragme, a plurality of frame units arranged to space said diaphragme apart and between which said diaphragme are removably engaged and rigidly held, means on said spacing units cooperatively registerable to insure alinement of said units and diaphragme, and means arranged to relatively separate said frame units simultaneously while preserving the same relative angular relation between adjacent units to permit the removal and replacement of said diaphragme.

8. A screen comprising relatively spaced perforated diaphragme, a plurality of frame units arranged to space said diaphragme apart, and between which the margins of said diaphragmsare removably engaged and rigidly held, the opposed surfaces of said frame units respectively having recesses and projections complementary to each other, arranged to register and insure alinement of said units, and means including a drum having stepped pulleys of relatively diderent diameters respectively connected vwith said frame units and arranged, when actuated, to effect the separation of said units at relatively different speeds, whereby their substantially uniform separation may be simultaneously effected.

9.. In a screen of the class described, the combination with a plurality of perforated diaphragme, of a plurality of frame units comprising lat-eral rails connected by U- shaped channel bars, and between which units the lateral margins of said diaphragme are arranged to be removably engaged and rigidly secured, a shaft .extending parallel with the end of said frame units spaced therefrom exterior thereof and about which said units are arranged to be oscillated, a bail pivoted to each of said frame units, a rotatable drum connected with said baile, and arranged when rotated to effect the separation of said units about thje axis of said shaft, and means arranged to actuate said drum.

l0. In a screen of the class described, the combination with a plurality of perforated diaphragme, of a plurality of frame units arranged to maintain said diaphragme relatively spaced apart, and between which the margins of said diaphragme are arranged to be engaged, a base frame upon which said units are mounted for relative oscillation, locking means embracing the units and ar ranged to rigidly secure said frame units and diaphragme to said base frame and to readily release said parte, and means arranged to relatively rock said frame units on said base frame whereby said unite may be contemporaneou'sly separated and all of the diaphragme simultaneously released.

ll. A multiple deck screen having a plurality of spacing frame units, a plurality of diaphragme rested upon the respective units and having their margins engaged therewith by the superjacent unite, and means arranged to contemporaneously separate said units in fan-like relation, comprising adrum having cone pulleys respectively connected with said frame unite.

In witness whereof, I have hereunto set my hand this eighteenth day of August, 1924.

HERBERT S. VOODWARD. 

